Intercommunication system



FIG. 1 is a perspective view of an intercommunication system according to the present invention;

FIG. 2 is a front view of the intercommunication system shown in FIG. 1;

FIG. 3 is a left side view of the intercommunication system shown in FIG. 1;

FIG. 4 is a right side view of the intercommunication system shown in FIG. 1; and,

FIG. 5 is a bottom view of the intercommunication system shown in FIG. 1. 

The ornamental design for an intercommunication system, substantially as shown and described. 